diff --git a/Casks/widelands.rb b/Casks/widelands.rb
index 73267932a..d94653859 100644
--- a/Casks/widelands.rb
+++ b/Casks/widelands.rb
@@ -4,7 +4,7 @@ cask :v1 => 'widelands' do
 
   url 'https://launchpad.net/widelands/build18/build-18/+download/widelands-build18-mac.dmg'
   homepage 'https://wl.widelands.org/'
-  license :unknown
+  license :unknown    # todo: improve this machine-generated value
 
   app 'Widelands.app'
 end